
int main()
{
    unsigned int *pGPFCON = (unsigned int *)0x56000050;
    unsigned int *pGPFDAT = (unsigned int *)0x56000054;

    // 配置GPF4控制寄存器为输出引脚
    *pGPFCON = 0x100;

    // 配置GPF4数据寄存器为输出引脚
    *pGPFDAT = 0;

    return 0;
}
